CN108655514B - Thread pair with angular position requirement and machining tool and machining method thereof - Google Patents
Thread pair with angular position requirement and machining tool and machining method thereof Download PDFInfo
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- CN108655514B CN108655514B CN201810268254.XA CN201810268254A CN108655514B CN 108655514 B CN108655514 B CN 108655514B CN 201810268254 A CN201810268254 A CN 201810268254A CN 108655514 B CN108655514 B CN 108655514B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/44—Equipment or accessories specially designed for machines or devices for thread cutting
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Abstract
The embodiment of the invention provides a thread pair with an angular position requirement, and a machining tool and a machining method thereof, and belongs to the technical field of machining. According to the thread pair machining method with the requirement on the angular position, provided by the embodiment of the invention, the circumferential direction of the part to be machined is positioned and fixed through the positioning line, so that the angular position states of the part are always consistent when the threads are machined on different parts, the adjusting value of the preset thread machining parameter is determined through positioning of the positioning assembly, the preset thread machining parameter is adjusted according to the adjusting value, the thread pair is machined according to the preset thread machining parameter, the accuracy of the angular position of the machined thread is ensured, and the thread pairs machined by the method can be randomly matched and combined and have interchangeability.
Description
Technical Field
The invention relates to a machining tool and a machining method for machining a thread pair with angular position requirements by a numerical control lathe through a mechanical cutting method, and belongs to the technical field of machining.
Background
The thread pair is a pair of internal thread and external thread which are mechanically connected after screwing, and the thread pair with angular position requirement is a thread pair with the positions of two specific points on the circumference of the internal thread and the external thread overlapped after complete screwing. For example, as shown in fig. 1, a thread pair with angular position requirement is an important link structure of a certain valve on a liquid rocket engine, and after the valve body 2 is connected with the adapter cap 1 through the thread pair, the valve body 2 is aligned with the outer shape surface (such as a plane indicated by a reference line of a reference number 1 and a plane indicated by a reference line of a reference number 2) of the adapter cap 1 due to limited engine assembly space.
Because the starting point of thread machining is difficult to determine, the traditional machining method of the thread pair at present is as follows: firstly, processing the thread structures of two parts (a valve body 2 and a switching cap 1 in figure 1) where a thread pair is located to form a semi-finished product, then screwing the threads, simultaneously processing the shapes of the two parts to ensure that the outer surfaces of the two parts are aligned, scribing aligned scribed lines a1 and a2 on the outer circles of the inner thread structure and the outer thread structure after the processing is finished, and judging whether the two parts are a pair or not by judging whether a1 and a2 are aligned (the included angle is less than or equal to 2 degrees) in the subsequent management of the parts.
Although the thread pair machining method can meet the requirement of alignment of the outer surfaces of the screwed threads, the two parts need to establish a one-to-one correspondence relationship, and the same parts do not have interchangeability, so that the production cost of the parts and the difficulty in production and management of the parts are increased.
Disclosure of Invention
The technical problem solved by the invention is as follows: the method solves the problems that threaded connection parts do not have interchangeability, are difficult to produce and manage and the like in the production and assembly processes of a certain valve of the liquid rocket engine, effectively realizes the machining of the threaded pair with the requirement on the angular position, and enables related parts to have good interchangeability.
In order to achieve the above purpose, the invention provides the following technical scheme:
a method of machining a thread pair having an angular position requirement, the thread pair including mating internal and external threads, comprising the steps of:
(1) the positioning assembly comprises a positioning block, the positioning block is provided with a scribed line and a thread, the scribed line is positioned on the outer surface of the positioning block and axially extends along the thread, and the thread is an external thread or an internal thread in a thread pair to be machined;
(2) fixing a part for testing, wherein a positioning line corresponding to the scribed line is arranged on the part, circumferential positioning is carried out through the positioning line, and internal threads or external threads are processed on the part for testing according to testing processing parameters;
(3) completely screwing a part with internal threads or external threads with the positioning block, and adjusting the test processing parameters according to the relative positions of the positioning line and the scribed line to obtain actual processing parameters;
(4) and fixing the part to be processed, carrying out circumferential positioning through a positioning line on the part to be processed, and processing internal threads or external threads on the part to be processed according to the actual processing parameters.
In an alternative embodiment, in step (2) or (4), the part is fixed by a multi-jaw fixing member, and the positioning line on the part is positioned by a positioning member fixed on one jaw of the multi-jaw fixing member.
In an optional embodiment, after the step (4), the method further comprises:
and (3) completely screwing the part with the internal thread or the external thread obtained in the step (4) with the positioning block, judging whether the positioning line of the part with the internal thread or the external thread obtained in the step (4) is matched with the scribed line, and if so, processing the internal thread or the external thread of the thread pair to be qualified.
In an optional embodiment, the positioning assembly includes a first positioning block and a second positioning block, the first positioning block is provided with a first scribed line and the internal thread, and the second positioning block is provided with a second scribed line and the external thread.
In an alternative embodiment, the first score line and the second score line match when the first positioning block and the second positioning block are fully rotated.
In an optional embodiment, the testing process parameters in step (3) include a starting point position parameter, and the adjusting the testing process parameters according to the relative positions of the positioning line and the scribe line includes:
taking the position of the part with the internal thread when the part with the internal thread is completely screwed with the second positioning block as a first position, taking the position of the part with the internal thread when a positioning line is matched with the second scribed line in the screwing or unscrewing process as a second position, and adjusting the position parameter of the first starting point according to the axial distance difference between the first position and the second position; or
And taking the position of the part with the external thread when the part with the external thread is completely screwed with the first positioning block as a third position, taking the position of the part with the external thread when the positioning line is matched with the first scribed line in the screwing or unscrewing process as a fourth position, and adjusting the position parameter of the second starting point according to the axial distance difference between the third position and the fourth position.
A thread pair machining tool with an angular position requirement comprises a positioning assembly and a positioning fixing assembly, wherein the positioning assembly comprises a positioning block, the positioning block is provided with a scribed line and a thread, the scribed line is positioned on the outer surface of the positioning block and extends axially along the thread, and the thread is an external thread or an internal thread in a thread pair to be machined; during processing, fixing a part for testing through the positioning fixing assembly, wherein a positioning line corresponding to the scribed line is arranged on the part, circumferential positioning is carried out through the positioning line, and internal threads or external threads are processed on the part for testing according to testing processing parameters; completely screwing a part with internal threads or external threads with the positioning block, and adjusting the test processing parameters according to the relative positions of the positioning line and the scribed line to obtain actual processing parameters; and fixing the part to be processed, carrying out circumferential positioning through a positioning line on the part to be processed, and processing internal threads or external threads on the part to be processed according to the actual processing parameters.
In an optional embodiment, the positioning and fixing assembly comprises a multi-jaw fixing member and a positioning member fixed on one jaw of the multi-jaw fixing member, the fixing member is used for fixing the part, and the positioning member is used for positioning a positioning line on the part.
In an optional embodiment, the positioning assembly comprises a first positioning block and a second positioning block, the first positioning block is provided with a first scribed line and the internal thread, and the second positioning block is provided with a second scribed line and the external thread;
when the first positioning block and the second positioning block are completely rotated, the first scribed line is matched with the second scribed line.
The thread pair with the angular position requirement is machined by the method.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the thread pair machining method with the requirement on the angular position, provided by the embodiment of the invention, the circumferential position of a part to be machined is positioned through the positioning line, so that the condition that the angular position of the part is consistent all the time when different parts are machined with threads is ensured, the adjusting value of the preset thread machining parameter is determined through the positioning of the positioning assembly, the preset thread machining parameter is adjusted according to the adjusting value, the thread pair is machined according to the preset thread machining parameter, the accuracy of the angular position of the machined thread is ensured, and the thread pairs machined by the method can be randomly matched and combined and have interchangeability;
(2) the method can process parts in batches and on a large scale, reduces the production cost of the parts, and reduces the management difficulty of the parts due to interchangeability among the parts;
(3) when the first positioning block and the second positioning block are completely screwed, the first scribed line and the second scribed line are aligned, so that scribed lines can be conveniently scribed, the machining precision can be conveniently judged, and the machining efficiency can be improved.
(4) The multi-claw fixing piece is arranged to facilitate axial positioning of the part, and the positioning piece is arranged on one claw to facilitate positioning of the part before the part is fixed, so that the positioning is convenient and accurate;
(5) whether the two processed parts are qualified or not is judged through the positioning assembly, unqualified parts can be simply and accurately found out, and high assembling precision of the thread pair during assembling is guaranteed.
Drawings
FIG. 1 is a schematic view of a valve configuration of a liquid rocket engine;
fig. 2 is a schematic structural diagram of a first positioning block according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a second positioning block according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a positioning and fixing assembly according to an embodiment of the present invention;
FIG. 5 is a schematic view of a part positioning fixture according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of in-process dimensional measurements provided by an embodiment of the present invention.
Detailed Description
The present invention will be further illustrated by the following preferred examples, but the present invention is not limited to the following examples.
As shown in fig. 2, an embodiment of the present invention provides a thread pair machining tool with an angular position requirement, including a positioning assembly and a positioning fixing assembly, where the positioning assembly includes a first positioning block 7 and a second positioning block 6, as shown in fig. 2, the first positioning block 7 is provided with a first scribed line (engraved on a surface a) and an internal thread, the first scribed line is located on an outer surface of the first positioning block 7 and extends axially along a thread, as shown in fig. 3, the second positioning block 6 is provided with a second scribed line (engraved on a surface b) matched with the first scribed line and an external thread, and the second scribed line is located on an outer surface of the second positioning block 6 and extends axially along the thread; the positioning and fixing assembly is used for positioning and fixing the part.
Specifically, in the embodiment of the present invention, the internal thread of the first positioning block is processed according to the design size of the internal thread of the thread pair, the external thread of the second positioning block is processed according to the design size of the external thread of the thread pair, after the internal thread and the external thread are processed, the internal thread and the external thread are screwed tightly, scribed lines are marked on two sides of the butt joint seam along the axis direction, a first scribed line is located at the internal thread end, and a second scribed line is located at the external thread end, and the matching of the first scribed line and the second scribed line may mean that the two scribed lines extend (align) along the same straight line, or that the two straight lines are parallel and the relative position relationship is fixed.
According to the thread pair machining tool with the requirement on the angular position, provided by the embodiment of the invention, the circumferential position of a part to be machined is positioned through the positioning line, so that the angular position state of the part is always consistent when different parts are machined with threads, the adjusting value of the preset thread machining parameter is determined through positioning of the positioning assembly, the preset thread machining parameter is adjusted according to the adjusting value, the thread pair is machined according to the preset thread machining parameter, the accuracy of the angular position of the machined thread is ensured, the thread pairs machined by the method can be randomly matched and combined, and the interchangeability is realized; the method can process parts in batches, reduces the production cost of the parts, and reduces the management difficulty of the parts due to interchangeability among the parts.
Referring to fig. 4, in an alternative embodiment, the positioning and fixing assembly includes a multi-jaw fixing member 3 and a positioning member 4 fixed on one jaw of the multi-jaw fixing member 3, the fixing member 3 is used for fixing a first part or a second part of a thread pair to be processed, the first part is provided with a first positioning line, the second part is provided with a second positioning line, the first positioning line and the second positioning line are linear scribed lines extending along an axial direction of a thread to be processed and are located on an outer wall of the part, and circumferential positions of the first positioning line and the second positioning line are not limited; the positioning element 4 is used for positioning a first positioning line on the first part or a second positioning line on the second part in the circumferential direction. The multi-claw fixing piece is convenient for axial positioning of the part, the positioning piece is arranged on one claw, so that circumferential positioning can be conveniently carried out on the part before the part is fixed, and the positioning is convenient and accurate.
Specifically, in the embodiment of the present invention, the fixing member 3 may be, for example, a three-jaw fixing member on a machine tool, or may be a four-jaw fixing member, a five-jaw fixing member, or the like, and is used to fix a part (a first part or a second part) on a numerical control machine tool; the positioning element 4 may be a positioning rod, a positioning pin, a positioning block, etc., and the positioning element 4 positions a positioning line (a first positioning line or a second positioning line) on the component by setting markers such as a positioning point, a surface, or a line on the component at a fixed position.
The embodiment of the invention also provides a method for machining a thread pair with angular position requirements by adopting the machining tool, wherein the thread pair comprises an internal thread and an external thread which are matched, and the method comprises the following steps:
step (1): a processing positioning assembly, as shown in fig. 2 and 3, the positioning assembly includes a first positioning block 7 and a second positioning block 6, as shown in fig. 2, the first positioning block 7 is provided with a first scribed line (engraved on the a surface) and the internal thread, as shown in fig. 3, the second positioning block 6 is provided with a second scribed line (engraved on the b surface) matched with the first scribed line and the external thread;
specifically, in the embodiment of the present invention, the internal thread of the first positioning block is processed according to the design size of the internal thread of the thread pair, the external thread of the second positioning block is processed according to the design size of the external thread of the thread pair, after the internal thread and the external thread are processed, the internal thread and the external thread are screwed tightly, scribed lines are marked on two sides of the butt joint seam along the axis direction, a first scribed line is located at the internal thread end, and a second scribed line is located at the external thread end, and the matching of the first scribed line and the second scribed line may mean that the two scribed lines extend (align) along the same straight line, or that the two scribed lines extend in parallel and the relative position relationship is fixed.
Step (2): respectively fixing a first part and a second part for testing, wherein a first positioning line corresponding to the first scribed line is arranged on the first part, a second positioning line corresponding to the second scribed line is arranged on the second part, circumferential positioning is carried out through the positioning lines, an internal thread is processed for the first part for testing according to a first testing processing parameter, an external thread is processed for the second part for testing according to a second testing processing parameter, and a first part with an internal thread and a second part with an external thread are obtained;
specifically, in the embodiment of the present invention, the test processing parameters may include parameters such as a start point, an end point, a spindle rotation speed, and a feeding speed; in the embodiment of the invention, the first positioning line and the second positioning line are also straight line scribed lines extending along the axial direction of the thread and are positioned on the outer wall of the part, and the circumferential positions of the first positioning line and the second positioning line are not limited;
and (3): completely screwing the first part with the internal thread and the second positioning block, and adjusting the first test processing parameter according to the relative position of the first positioning line and the second scribed line to obtain a first actual processing parameter; completely screwing the second part with the external thread and the first positioning block, and adjusting the second test processing parameter according to the relative position of the second positioning line and the first scribed line to obtain a second actual processing parameter;
specifically, in the embodiment of the present invention, complete screwing refers to screwing the internal and external threads, when a positioning line (a first positioning line or a second positioning line) is matched with a scribe line (a first scribe line or a second scribe line) after complete screwing, it is considered that a test processing parameter (a first processing parameter or a second processing parameter) is a processing parameter that should be actually used, when the positioning line is not matched with the scribe line, the internal and external threads are unscrewed until the positioning line is matched with the scribe line, and the processing parameter is adjusted according to the position at that time to obtain an actual processing parameter;
and (4): the method comprises the steps of fixing a first part and a second part to be machined respectively, carrying out circumferential positioning through a positioning line on the part to be machined, machining an internal thread for the first part to be machined according to a first actual machining parameter, and machining an external thread for the second part to be machined according to a second actual machining parameter to obtain a thread pair with an angular position requirement.
According to the thread pair machining method with the requirement on the angular position, provided by the embodiment of the invention, the parts to be machined are positioned and fixed, so that the angular position states of the parts are always consistent when the threads are machined on different parts, the adjusting value of the preset thread machining parameter is determined through positioning of the positioning assembly, the preset thread machining parameter is adjusted according to the adjusting value, the thread pair is machined according to the preset thread machining parameter, the accuracy of the angular position of the machined threads is ensured, and the thread pairs machined by the method can be randomly matched and combined and have interchangeability; the method can process parts in batches and on a large scale, reduces the production cost of the parts, and reduces the difficulty of part management due to interchangeability among the parts.
In an optional embodiment, in step (2) or (4), the first part or the second part is fixed by a fixing member, and a first positioning line on the first part or a second positioning line on the second part is positioned by a positioning member.
Further, in an optional embodiment, after the step (4), the method further includes:
completely screwing the first part with the internal thread obtained in the step (4) with the second positioning block, judging whether the first positioning line on the first part obtained in the step (4) is matched with the second scribed line, and if so, processing the internal thread of the thread pair to be qualified; and (3) completely screwing the second part with the external thread obtained in the step (4) with the first positioning block, judging whether a second positioning line on the second part in the step (4) is matched with the first scribed line, and if so, processing the external thread of the thread pair to be qualified. Whether the two processed parts are qualified or not is judged through the positioning assembly, unqualified parts can be simply and accurately found out, and the consistency of the angular positions of the threads and the high assembling precision of the thread pair during assembling are ensured.
In an alternative embodiment, the first test processing parameter in step (3) includes a first scribe line position parameter, and the adjusting the first test processing parameter according to the relative positions of the first alignment line and the second scribe line includes:
taking the position of the first testing piece with the internal thread when the first testing piece and the second positioning block are completely screwed as a first position, taking the position of the first positioning line matched with the second scribed line in the screwing or unscrewing process as a second position, and adjusting the position parameter of the first starting point according to the axial distance difference between the first position and the second position; and/or
The second test processing parameter includes a second starting point position parameter, and the adjusting the second test processing parameter according to the relative position of the second positioning line and the first scribed line includes:
and taking the position of the second part with the external thread when the second part is completely screwed with the first positioning block as a third position, taking the position of the second positioning line matched with the first scribed line in the screwing or unscrewing process as a fourth position, and adjusting the position parameter of the second starting point according to the axial distance difference between the third position and the fourth position.
The method ensures the consistency and the accuracy of the angular positions of the processed threads, and the processed thread pairs can be randomly matched and combined and have interchangeability; and the method can be used for processing parts in batches and on a large scale, and the difficulty and the cost of part production and management are reduced.
The following is a specific embodiment of the present invention:
the embodiment provides a right-handed thread pair, which comprises the following processing steps:
step (1): a processing positioning assembly, as shown in fig. 2 and 3, the positioning assembly includes a first positioning block 7 and a second positioning block 6, as shown in fig. 2, the first positioning block 7 is provided with a first scribed line (engraved on the a surface) and the internal thread, as shown in fig. 3, the second positioning block 6 is provided with a second scribed line (engraved on the b surface) matched with the first scribed line and the external thread;
step (2): as shown in fig. 5, a first part for testing is fixed on a numerical control machine tool through a three-jaw fixing part 3, and a first plane c of the first part is attached to a rod-shaped positioning part 4 during fixing, so as to ensure that the circumferential position of a first positioning line q is always fixed when internal threads are machined on different first parts, and the internal threads are machined on the first part for testing according to a first testing machining parameter (numerical control program);
step (3) after machining, temporarily not detaching the first part with the internal thread, screwing the second positioning block 6 and the first part 5 with the internal thread to completely screw the internal thread and the external thread, as shown in fig. 6, measuring the distance L between the M surface and the N surface at the right end of the second positioning block 6, and marking as L1, rotating the second positioning block 6 anticlockwise (facing to the negative direction of the Z axis of the machine tool) to align the first positioning line q of the first part with the second scribed line of the second positioning block 6, measuring the distance L between the M surface and the N surface again, and marking as L2, calculating △ L as L2-L1, adjusting △ L of the Z coordinate of the thread start point in the numerical control program to the left, ensuring that other cutting parameters of the machine tool are inconvenient, and obtaining the actual first machining parameters;
and (4) machining an internal thread for the subsequent first part according to the actual first machining parameter to obtain the first part with the internal thread.
And (5) completely screwing the second positioning block 6 and the first part with the internal thread obtained in the step (4), and detecting the angular position state and quality of the thread by judging whether the first positioning line is aligned with the second scribed line
And (5): and (5) processing external threads on the second part according to the steps (2) to (4) and by adopting the first positioning block 7, wherein the specific steps are not described again.
After processing, the products are connected through the thread pair, the requirement of aligning the outer surfaces of the two products can be met, and the interchangeability is good.
The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (9)
1. A thread pair machining method with angular position requirements is characterized by comprising an internal thread and an external thread which are matched, and the method comprises the following steps:
(1) the positioning assembly comprises a positioning block, the positioning block is provided with a scribed line and a thread, the scribed line is positioned on the outer surface of the positioning block and axially extends along the thread, and the thread is an external thread or an internal thread in a thread pair to be machined;
(2) fixing a part for testing, wherein a positioning line corresponding to the scribed line is arranged on the part, circumferential positioning is carried out through the positioning line, and internal threads or external threads are processed on the part for testing according to testing processing parameters;
(3) completely screwing a part with internal threads or external threads with the positioning block, and adjusting the test processing parameters according to the relative positions of the positioning line and the scribed line to obtain actual processing parameters;
(4) and fixing the part to be processed, carrying out circumferential positioning through a positioning line on the part to be processed, and processing internal threads or external threads on the part to be processed according to the actual processing parameters.
2. The method for machining the thread pair with the angular position requirement according to claim 1, wherein in the step (2) or (4), the part is fixed through a multi-jaw fixing piece, and a positioning line on the part is positioned through a positioning piece fixed on one jaw of the multi-jaw fixing piece.
3. The thread pair machining method with angular position requirement according to claim 2, characterized by further comprising, after the step (4):
and (3) completely screwing the part with the internal thread or the external thread obtained in the step (4) with the positioning block, judging whether the positioning line of the part with the internal thread or the external thread obtained in the step (4) is matched with the scribed line, and if so, processing the internal thread or the external thread of the thread pair to be qualified.
4. The method of claim 1, wherein the positioning assembly comprises a first positioning block and a second positioning block, the first positioning block is provided with a first score line and the internal thread, and the second positioning block is provided with a second score line and the external thread.
5. The method of claim 4, wherein the first score line and the second score line match when the first locating block and the second locating block are fully rotated.
6. The method of claim 4, wherein the test machining parameters of step (3) include a start point position parameter, and wherein adjusting the test machining parameters based on the relative positions of the locating line and the score line comprises:
taking the position of the part with the internal thread when the part with the internal thread is completely screwed with the second positioning block as a first position, taking the position of the part with the internal thread when a positioning line is matched with the second scribed line in the screwing or unscrewing process as a second position, and adjusting a first starting point position parameter according to the axial distance difference between the first position and the second position; or
And taking the position of the part with the external thread when the part with the external thread is completely screwed with the first positioning block as a third position, taking the position of the part with the external thread when the positioning line is matched with the first scribed line in the screwing or unscrewing process as a fourth position, and adjusting the position parameter of a second starting point according to the axial distance difference between the third position and the fourth position.
7. The thread pair machining tool with the angular position requirement is characterized by comprising a positioning assembly and a positioning fixing assembly, wherein the positioning assembly comprises a positioning block, the positioning block is provided with a scribed line and a thread, the scribed line is positioned on the outer surface of the positioning block and axially extends along the thread, and the thread is an external thread or an internal thread in a thread pair to be machined; during processing, fixing a part for testing through the positioning fixing assembly, wherein a positioning line corresponding to the scribed line is arranged on the part, circumferential positioning is carried out through the positioning line, and internal threads or external threads are processed on the part for testing according to testing processing parameters; completely screwing a part with internal threads or external threads with the positioning block, and adjusting the test processing parameters according to the relative positions of the positioning line and the scribed line to obtain actual processing parameters; and fixing the part to be processed, carrying out circumferential positioning through a positioning line on the part to be processed, and processing internal threads or external threads on the part to be processed according to the actual processing parameters.
8. The tooling for machining the thread pair with the requirement on the angular position according to claim 7, wherein the positioning and fixing assembly comprises a multi-claw fixing piece and a positioning piece fixed on one claw of the multi-claw fixing piece, the fixing piece is used for fixing the part, and the positioning piece is used for positioning a positioning line on the part.
9. The tooling for machining the thread pair with the angular position requirement as claimed in claim 7, wherein the positioning assembly comprises a first positioning block and a second positioning block, the first positioning block is provided with a first scribing line and the internal thread, and the second positioning block is provided with a second scribing line and the external thread;
when the first positioning block and the second positioning block are completely rotated, the first scribed line is matched with the second scribed line.
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| FR1008958A (en) * | 1949-03-28 | 1952-05-23 | Crucelegui Sa | Device for precision measurements adaptable to machine tools |
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| CN106238834B (en) * | 2016-08-30 | 2018-04-03 | 山西北方机械制造有限责任公司 | A kind of processing method for determining starting point screw thread |
| CN106271801B (en) * | 2016-08-31 | 2018-11-02 | 中航动力股份有限公司 | A kind of aligning method and its fixture that part is angular |
| CN106424981A (en) * | 2016-10-27 | 2017-02-22 | 上海新力动力设备研究所 | Novel method for accurately positioning thread of engine casing |
| CN206455250U (en) * | 2017-02-13 | 2017-09-01 | 洛阳恒诺锚固技术有限公司 | A kind of female thread machining device of drill bit thread bushing |
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2018
- 2018-03-29 CN CN201810268254.XA patent/CN108655514B/en active Active
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